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    <meta charset="UTF-8">
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    <title>Document</title>
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    <h1>表单进阶-单选框</h1>

    <div>满意度调查</div>

    <div>
        <input type="radio" name="a" checked="checcked">非常满意
    </div>
    <div>
        <input type="radio" name="a">满意
    </div>
    <div>
        <input type="radio" name="a">一般
    </div>
    <p>性别</p>
    <div>
        <input type="radio" name="sex" id="man"> 
        <label for="man"> 男</label>
    </div>
        <input type="radio" name="sex" id="woman">
         <label for="woman"> 女</label>
    </div>
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